MySQL: Explain CURRENT_USER() in MySQL.

 

In MySQL, the CURRENT_USER() function is used to return the current user and host name combination that the server used to authenticate the current client connection. It provides information about the user account under which the current session is operating.

The basic syntax of CURRENT_USER() is as follows:

sql
CURRENT_USER()

When you execute this function, it returns a string in the format user_name@host_name. Here, user_name is the MySQL username, and host_name is the host from which the connection is made.

For example:

sql
SELECT CURRENT_USER();

This query will return something like user_name@localhost, indicating the current user and host for the current MySQL session.

It's important to note that CURRENT_USER() does not require parentheses when used, so you can also write it as CURRENT_USER without the parentheses.

This function is particularly useful when you need to determine the identity of the user who is connected to the MySQL server at any given moment. It can be employed in access control, auditing, or any scenario where information about the current user is relevant.